content: package com.mitakeran.magicfilter.filter.advance.common;
  
  import java.nio.ByteBuffer;
  
  import android.content.Context;
  import android.opengl.GLES20;
  
  import com.mitakeran.magicfilter.R;
  import com.mitakeran.magicfilter.filter.base.gpuimage.GPUImageFilter;
  import com.mitakeran.magicfilter.utils.OpenGLUtils;
  
  public class MagicSakuraFilter extends GPUImageFilter{
  	
  	private int[] mToneCurveTexture = {-1};
  	private int mToneCurveTextureUniformLocation;
  	private int mTexelHeightUniformLocation;
  	private int mTexelWidthUniformLocation;
  	
  	public MagicSakuraFilter(Context context){
  		super(NO_FILTER_VERTEX_SHADER,OpenGLUtils.readShaderFromRawResource(context, R.raw.romance));
  	}
  	
  	public void onDestroy(){
  		super.onDestroy();
  	    GLES20.glDeleteTextures(1, mToneCurveTexture, 0);
  	    mToneCurveTexture[0] = -1;
  	}
  	  
  	protected void onDrawArraysAfter(){
  		if (mToneCurveTexture[0] != -1){
  			GLES20.glActiveTexture(GLES20.GL_TEXTURE3);
  			GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
  			GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
  	    }
  	}
  	  
  	protected void onDrawArraysPre(){
  		if (mToneCurveTexture[0] != -1){
  			GLES20.glActiveTexture(GLES20.GL_TEXTURE3);
  			GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mToneCurveTexture[0]);
  			GLES20.glUniform1i(mToneCurveTextureUniformLocation, 3);
  	    }
  	}
  	  
  	public void onInit(){
  		super.onInit();
  	    mToneCurveTextureUniformLocation = GLES20.glGetUniformLocation(mGLProgId, "curve");
          mTexelWidthUniformLocation = GLES20.glGetUniformLocation(getProgram(), "texelWidthOffset");
          mTexelHeightUniformLocation = GLES20.glGetUniformLocation(getProgram(), "texelHeightOffset");
  	}
  	  
  	public void onInitialized(){
  		super.onInitialized();
  	    runOnDraw(new Runnable(){
  		    public void run(){
  		    	GLES20.glGenTextures(1, mToneCurveTexture, 0);
  			    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mToneCurveTexture[0]);
  			    GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
  		                GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
  		        GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
  		                GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
  		        GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
  		                GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
  		        GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
  		                GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);					
  		        byte[] arrayOfByte = new byte[1024];
  		        int[] arrayOfInt = { 95, 95, 96, 97, 97, 98, 99, 99, 100, 101, 101, 102, 103, 104, 104, 105, 106, 106, 107, 108, 108, 109, 110, 111, 111, 112, 113, 113, 114, 115, 115, 116, 117, 117, 118, 119, 120, 120, 121, 122, 122, 123, 124, 124, 125, 126, 127, 127, 128, 129, 129, 130, 131, 131, 132, 133, 133, 134, 135, 136, 136, 137, 138, 138, 139, 140, 140, 141, 142, 143, 143, 144, 145, 145, 146, 147, 147, 148, 149, 149, 150, 151, 152, 152, 153, 154, 154, 155, 156, 156, 157, 158, 159, 159, 160, 161, 161, 162, 163, 163, 164, 165, 165, 166, 167, 168, 168, 169, 170, 170, 171, 172, 172, 173, 174, 175, 175, 176, 177, 177, 178, 179, 179, 180, 181, 181, 182, 183, 184, 184, 185, 186, 186, 187, 188, 188, 189, 190, 191, 191, 192, 193, 193, 194, 195, 195, 196, 197, 197, 198, 199, 200, 200, 201, 202, 202, 203, 204, 204, 205, 206, 207, 207, 208, 209, 209, 210, 211, 211, 212, 213, 213, 214, 215, 216, 216, 217, 218, 218, 219, 220, 220, 221, 222, 223, 223, 224, 225, 225, 226, 227, 227, 228, 229, 229, 230, 231, 232, 232, 233, 234, 234, 235, 236, 236, 237, 238, 239, 239, 240, 241, 241, 242, 243, 243, 244, 245, 245, 246, 247, 248, 248, 249, 250, 250, 251, 252, 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 };
  		        for (int i = 0; i < 256; i++)
  		        {
  		          arrayOfByte[(i * 4)] = ((byte)arrayOfInt[i]);
  		          arrayOfByte[(1 + i * 4)] = ((byte)arrayOfInt[i]);
  		          arrayOfByte[(2 + i * 4)] = ((byte)arrayOfInt[i]);
  		          arrayOfByte[(3 + i * 4)] = ((byte)arrayOfInt[i]);
  		        }
  		        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, 256, 1, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, ByteBuffer.wrap(arrayOfByte));
  		    }
  	    });
  	}
  	
  	public void onOutputSizeChanged(int width, int height) {
          super.onOutputSizeChanged(width, height);
          GLES20.glUniform1f(mTexelWidthUniformLocation, (1.0f / (float)width));
          GLES20.glUniform1f(mTexelHeightUniformLocation, (1.0f / (float)height));
      }
  }
  